A335 P9 / SA 335 p22 ASTM Standard 6 inches diameter sprial welding
1)Boiler economizers are heat exchange devices with finned tubes
that heat a liquid, sometimes water, up to however sometimes
doesn't exceed the boiling purpose of liquid.
2)We can manufacture three types of boiler economizer, bare tube
economizer, H finned tube economizer and spiral finned tube
3)H-finned tube economizer is high efficient heat exchanger
economizer which is consisted of H-finned tubes.
4)Compared with bare tube economizer, H-finned tube economizer can
enlarge the heat exchange area and reduce the number of tubes.
5)It also can increase the flue gas flow area in order to reduce
the flue gas flow speed and abrasion.
H-finned tube can be made as double H finned tubes , with high
rigidness to fit long tube row.
6)The spiral finned economizer is a newly designed heat transfer
equipment, consists of spiral fin tubes to overcome the serious
abrasion and short service time.
|Material||Alloy steel, Carbon steel, SA210C ,SA213T22, etc.|
|Material standard||ASTM, EN or ISO etc.|
Min: 10 ton
|Smelting Process:||EF+LF + VD|
|Process||Material→Ingot → Hot/Cold-Rolling→ Heat treatment (Normalizing+
tempering) → Inspection →rough machining→UT →2nd Heat treatment
→finishing machining →Inspection|
|UT standard||ASTM A388 or EN10228, etc|
1. Impact test and Strength calculation report with applied
2. 100%NDT(non-destructive inspection) report of steel plate, tube
3. X-ray, γ-ray and liquid penetrant test inspection report
(welding seam): to ensure the quality of the entire boiler.
4. Hydraulic test report: ensure the standard working pressure and
|1||Fabrication area of 400,000 square meters|
|3||600 Coded welders|
|4||60 Licensed Inspectors(NDT Level-III instructors)|
|5||Class-A Licenses for Design and Manufacture Boiler|
|6||ISO 9001:2008 Quality System|
|7||ASME Certificate of Power Boilers|
|8||ASME 'S','U' and NB stamp authorization|